steve harrigan is live outside the miami marlins' ballpark. steve? >> reporter: gregg, a remarkable comeback story we're likely to see unfold tonight. seven years ago adam greenberg was a 24-year-old outfielder for the cubs. on the first pitch of his first major league at bat he was struck by a fast ball traveling at 92 miles an hour. he was hit just under the helmet in the back of the head. here's how adam described that plow. >> turned to get out of the way, but unfortunately, i didn't get out of the way enough, and it caught right up under my helmet, so it made direct contact with my skull, and i felt like my head split open. grabbed my head immediately, i thought i was holding it together because it really felt like it submit, and i was just -- split, and i was just pretty scared. >> reporter: for some time after that, adam suffered double vision, he was sent down to the minors and struggled there for some time in the minor leagues. now tonight he gets his shot back with the miami marlins. he signed a one-day contract, and really the motivation h